Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem é o incumbente republicano para a Pensilvânia 9?
 ###Tabelas: CREATE TABLE series_2 (series_2_id AUTO_INCREMENT PRIMARY KEY, Episode Number INT, Air Date VARCHAR, Guest Host VARCHAR, Musical Guest (Song performed) VARCHAR, Who knows the most about the guest host? panelists VARCHAR) CREATE TABLE 1905-1909 (1905-1909_id AUTO_INCREMENT PRIMARY KEY, number INT, date of debut VARCHAR, name VARCHAR, date of birth VARCHAR, number of caps INT, number of goals INT, date of death† VARCHAR) CREATE TABLE top_recipient_countries (top_recipient_countries_id AUTO_INCREMENT PRIMARY KEY, Country VARCHAR, Remittances 2008 VARCHAR, Remittances 2009 VARCHAR, Remittances 2010 VARCHAR, Remittances 2011 VARCHAR) CREATE TABLE pennsylvania (pennsylvania_id AUTO_INCREMENT PRIMARY KEY, District VARCHAR, Incumbent VARCHAR, Party VARCHAR, First elected INT, Results VARCHAR) CREATE TABLE composition_of_the_5th_seanad (composition_of_the_5th_seanad_id AUTO_INCREMENT PRIMARY KEY, Administrative Panel INT, Agricultural Panel INT, Cultural and Educational Panel INT, Industrial and Commercial Panel INT, Labour Panel INT, National University of Ireland INT, University of Dublin INT, Nominated by the Taoiseach INT, Total INT)  
SELECT Incumbent FROM pennsylvania WHERE Party = republican AND District = pennsylvania 9